PM / Domains: Move dev_pm_domain_attach|detach() to pm_domain.h

The commit 46420dd73b80 (PM / Domains: Add APIs to attach/detach a PM
domain for a device) started using errno values in pm.h header file.
It also failed to include the header for these, thus it caused
compiler errors.

Instead of including the errno header to pm.h, let's move the functions
to pm_domain.h, since it's a better match.

Fixes: 46420dd73b80 (PM / Domains: Add APIs to attach/detach a PM domain for a device)
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/amba/bus.c

@@ -15,6 +15,7 @@
 #include <linux/io.h>
 #include <linux/pm.h>
 #include <linux/pm_runtime.h>
+#include <linux/pm_domain.h>
 #include <linux/amba/bus.h>
 #include <linux/sizes.h>
 

drivers/base/platform.c

@@ -21,6 +21,7 @@
 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/pm_runtime.h>
+#include <linux/pm_domain.h>
 #include <linux/idr.h>
 #include <linux/acpi.h>
 #include <linux/clk/clk-conf.h>

drivers/i2c/i2c-core.c

@@ -48,6 +48,7 @@
 #include <linux/irqflags.h>
 #include <linux/rwsem.h>
 #include <linux/pm_runtime.h>
+#include <linux/pm_domain.h>
 #include <linux/acpi.h>
 #include <linux/jump_label.h>
 #include <asm/uaccess.h>

drivers/mmc/core/sdio_bus.c

@@ -16,6 +16,7 @@
 #include <linux/export.h>
 #include <linux/slab.h>
 #include <linux/pm_runtime.h>
+#include <linux/pm_domain.h>
 #include <linux/acpi.h>
 
 #include <linux/mmc/card.h>

drivers/spi/spi.c

@@ -35,6 +35,7 @@
 #include <linux/spi/spi.h>
 #include <linux/of_gpio.h>
 #include <linux/pm_runtime.h>
+#include <linux/pm_domain.h>
 #include <linux/export.h>
 #include <linux/sched/rt.h>
 #include <linux/delay.h>

include/linux/pm.h

@@ -622,17 +622,6 @@ struct dev_pm_domain {
 	void (*detach)(struct device *dev, bool power_off);
 };
 
-#ifdef CONFIG_PM
-extern int dev_pm_domain_attach(struct device *dev, bool power_on);
-extern void dev_pm_domain_detach(struct device *dev, bool power_off);
-#else
-static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
-{
-	return -ENODEV;
-}
-static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
-#endif
-
 /*
  * The PM_EVENT_ messages are also used by drivers implementing the legacy
  * suspend framework, based on the ->suspend() and ->resume() callbacks common

include/linux/pm_domain.h

@@ -301,4 +301,15 @@ static inline int of_genpd_add_provider_onecell(struct device_node *np,
 	return __of_genpd_add_provider(np, __of_genpd_xlate_onecell, data);
 }
 
+#ifdef CONFIG_PM
+extern int dev_pm_domain_attach(struct device *dev, bool power_on);
+extern void dev_pm_domain_detach(struct device *dev, bool power_off);
+#else
+static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
+{
+	return -ENODEV;
+}
+static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
+#endif
+
 #endif /* _LINUX_PM_DOMAIN_H */